Machinery for preparing hubs for boxes



UNITE STTFS FAENT FFIQE.

ISAAC MUNDEN, OF ALLEGHENY CITY, PENNSYIVANIA.

`lVIACI-IIINERY FOR PREPARING HUBS FOR BOXES.

Specication of Letters Patent No. 6,941, dated December 11, 1849.

To all whom t may concern Be it known that I, IsAAo MUNDEN, of Allegheny City, of the county of and State of Pennsylvania, have invented a new and.

useful machine for boring out the inside of wagon and carriage hubs, or the whole and half box, which I call the universal boxingmachine-f and I do hereby declare that the following is a clear, full, and exact description of my invention, reference being had therein to the annexed drawings, which form a part of this specification and of which-' Figure 1 is a side view of the machine in a vertical position. Fig. 2 is a section of the same. Fig. 3 is a section of support h, and arm c, Fig-s. l and 2. Fig. 4 is an underside view of same. Fig. 5 is a top view of one miter wheel e, with adjusting screw l), and compensating nut (l, connected. Fig. 6 is a top View of binding plate or ring j. Fig. 7 is a section of large miter wheel Fig. 8 is a View of cutter for making tapering holes. Fig. 9 is a view of cutter for boring square or straight holes. Fig. 10- is a View of the same as Fig. 9. Fig. 11 is an enlarged view of screw or mandrel.

Literal references: A, mandrel; B, clamps; C, cutter holder; a, Inuf with nut in it; b adjusting clamp screws; c, arms under screws 6,' d, nuts on screws Z); e, small miter wheels; f, large miter wheel; g, muff supporting same; 71 stays or cross-piece; z', support (hexagonal); j, circular plate or ring; la, set or adjusting screws in j; l, ears on wheel f; m, center or gage muf; n, ear on same; o, screw on mandrel; p, segmental nut in a; Q, shoulders on clamps; r, teeth on same; s, screw-pin on mandrel; t, eye in cutter-holder; u, cutting tools; c, project-ionl on cutter-holder; a, hole for pin in mandrel. Similar letters indicate the same parts. The nature of my invention consists of a combination of adjusting clamps or jaws with a mandrel, for the purpose of centering the mandrel perfectly and holding a carriage or wagon hub firmly while being bored; the application to the mandrel of a screw with a thread of the square and V form working in a segmental hinge nut, for the purpose of preventing the mandrel from going downward too fast while boring, and

yet, at the same time, allowing the operator to raise and lower it at pleasure; a peculiar mode of forming the cutting-tool for boring, and of fastening it to the mandrel to keep it tight; and also an arrangement for screwing and unscrewing the cutting-tool without using a wrench, which several'parts, together with other subordinate and operating parts connected therewith, constitute a boxing machine for boring out the inside of wagon and carriage hubs with great dispatch, precision, and regularity.

To enable others skilled in the art to understand and use my invention, I will now proceed to describe its construction and operation:

In Fig. l, A, is a mandrel; B, B, B, are three legs, jaws or clamps, which are placed equidistant about the mandrel; they are fastened at one end by joints to a sliding mutt' or cylinder, a, which slides back and forth on the mandrel; and they are supported, held in place and regulatedby three adjusting screws b, b, b, and bars or arms c, c, c, lying immediately under the said screws, extending outward from the mandrel and passing througs the jaws or clamps B, B, B, near their middle. The adjusting screws work in compensating or self-adjusting cylindrical nuts d, el, d, which are inclosed in suitable boxes formed in the jaws; end, side, and top views of these nuts are shown in Figs. l, 2 and 5. The adjusting screws Z), b, b, are headed in three small miter wheels e, e, c, which face inward upon the mandrel and gear into one larger wheel f, that is fixed on a sliding muli or cylinder g, which also moves back and forth upon the mandrel. The sliding muf g, forms a part of and is connect/,edwith a hexagonal support z', by three stays or cross-pieces h, 7L, h; which support incloses the sliding mulf g, and bears and holds in place the adjusting screws b, b, and the miter wheels e, e, e; and from which also extend the arms C, c, c.

By Fig. Ll, is represented an underside View of the support c', and its connected parts, the sliding muff g, and the arms c, c, 0,' and by.Fig. 8, is represented a vertical section of the same.

The large miter wheel f, is boxed in upon the cylinder or mutt' g, and the small wheels e, e, e, that gear into it, with a flat circular plate or ring y', which is fastened to the vsupport z', by means of small adjusting screws 7c, la, la. A top view of the ring or through the hole a, inV the mandrel, when the jaws B, B, B, are to be closed or unclosed. The pin being passed through the hole when it is above the mutt g, it is brought up against the ears Z, Z, and the mandrel being then turned, motion is given to the wheel f, which meshes into the small wheels e, e, e, and thus turning the adjusting screws b, Z), Z), open and close the jaws B, B, B, simultaneously and equally.

Between the cylinders or sliding muffs a, and g, is placed another muft7 or cylinder m, which may also be moved back and forth on the mandrel or may be keyed up to one place; and on this muti', extending toward the mud g, and lying vclose against the mandrel is also an ear a, which is a little Y longer than the ears Z, Z, so that when the mutt m, is moved up to the muif g, the ears on both muffs will pass each other without locking, the ear n, coming inside of the ears Z, Z, and between them and the mandrel, and its end in contact with the top of the muti g. The object of this arrangement is, that the mutt1 m, shall act as a set or gage for governing the mandrel and determining its penetration in boring a hub; it is keyed up at any point on the mandrel according to the depth of the bore, and when the mandrel has penetrated into the hub the proper distance, the ear n, comes up against the top of the muif `g, which prevents it (the mandrel) from going farther.

Upon the upper part of the mandrel is cut a screw 0, the thread of the square and V in its form, like an ordinary saw-tooth, the square side facing downward or toward the boring end of the mandrel. Seated in the muH a, is a segmental flap or hinge nut 79, which lits upon the screw o, the thread of which is shown, enlarged, in Fig. l1.

The function of the nut p, is very important and requires special observation. Vlhen the nut is in its place and t-s close down upon theA screw 0, it prevents the mandrel from going downward or penetrating the hub faster-than the turning of the thread, while boring, the square sides of the thread taking hold together and binding against each other; and, at the same time, the nut offers no resistance to the mandrel in going an opposite or upward direction, for the reason that the upper side of the thread being of the V* form, or an inclined plane, both on the nut and the mandrel, it slips or rises on its hinge and allows the mandrel to pass without difliculty. The obvious advantage of this arrangement is that while thenut regulates the boring and prevent-s the mandrel from going down and penetrating the hub too rapidly, it also allows it to slip backward in boring very hard wood or when the cutting-tool comes in contact with 4a knot or other obstruction, re-

quiri'ng a slower movement to penetrate, it;

whereas if the mandrel were forced down or forward by a common screw and ixed nut, it would be liable to vvbe `sprung ror broken by the resistance. Another advantageous property of the segmental hinge nut j?, is that it may be raised from the screw 0, giving free passage up or down through the muif g, at the will of the operator.

At the lower ends of the jaws or clamps B, are square shoulders g, and grips or teeth r, for the purpose of holding firmly the hubs while being bored, the shoulders resting upon the end'of the hub and the teeth biting into the side when the clamps are screwed up.

Upon the lower end of the mandrel is a screw-pin s, of about half its diameter, upon which isfitted a cap or cutter-holder C, in which is a corresponding female screw. The construction of this cap and the plan of securing the cutting-tool in it are novel and simple. Near the head of the cap or cutter-holder is a rectangular eye t, which passes through it and opens into the aperture for receiving the screw-pin s; and this eye is designed to receive the shank of the cutting-tool u, two forms of which, one for boring a tapering and the other a straight hole, are exhibited in Figs. 8 and 9 and' 12.

When the cutting-tool is introduced into the eye t, and the cap or holders, C, is screwed on to the screw pin s, the point of the screw-pin comes against the shank of the cutting-tool and secures it firmly in its place.

On the upper end of the cap C, is a square projection c, the object of which is to lock into one of the cross-pieces for the purose of screwing the cap on tight and thus astening the cutting-tool in it, in the manner just described, .and for unscrewing the same, the mandrel being turned one way or the other for the purpose; which arrangement does away entirely with the `use of a wrench for screwing the cutter-holder oft' and' on, and performs the operation readily and easily.

The mandrel may be turned with the ordinary cross-handle or a crank fixed on its upper end.

Having described the construction and arrangement of my boxing machine, I will now explain the manner of using it. The cutting-tool being placed in the cap C, and properly secured, in the manner just described,`I place the hub to be bored between the clamps B, the end resting against the shoulder g, and the side against the teeth r;

muf m, is keyed up tight upon the mandrel at the proper point or distance from the muli for boring the requisite depth into the hub; and this being done the work can be proceeded with.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is l. I claim the hinged saws B, B, B, constructed and arranged in the manner described and operated as set forth, for centering the mandrel A, to bore wagon or carriage hubs.

2. I claim the hinged segmental nut 10, const-ructed as described, in combination with the mandrel-A, which has a square and inclined thread, 0, cut upon it, as represented in Fig. 11, to coincide with a thread of the same form cut on the inside of the said nut, to prevent the mandrel from feeding down too fast in the act of boring, and also to allow the mandrel to be moved up or down at pleasure, in the manner substantially as herein described.

3. I claim the mode of fastening the cutter u, to the mandrel A, by passing it through the slot or eye t, of the nut or cutter-box C, formed with an interior thread to t on to the screw-pin s, of the mandrel, whereby by screwing on the nut C, the end of the mandrel is made to retain the cutter u, rmly in its proper position for boring. In connection with this Aarrangement for setting and securing the cutting-tool, I claim the cutter-box formed with the projection w, whereby by raising it (the box) until it comes in contact with the shoulder formed by the braces h, the cutter can be screwed and unscrewed without a Wrench, as herein fully set forth.

ISAAC MUNDEN.

Witnesses:

S. FORGEY, JAMES MUNDEN. 

